......but if that's what Benelli recommended.../ not following their recommendations is probably not your smartest choice !

Their recommendation may be performance related ...or it may vary with the type of slug you elect to shoot - I don't know. But if they're telling you they recommend a Cyclinder choke...then I'd buy one since the gun does not come with a Cyclinder choke ( Only an Imp Cyc, Mod and Full )...

or at least check with your local dealer.../ IC might be ok ---or it might not / and you don't want to ruin a barrel finding out.